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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SchemaCompositeIndex.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.schema;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.ArrayList;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.HashSet;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.List;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import javax.xml.stream.XMLStreamException;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import javax.xml.stream.XMLStreamReader;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import javax.xml.stream.XMLStreamWriter;<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>import org.jsimpledb.core.Database;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.jsimpledb.core.InvalidSchemaException;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.jsimpledb.util.DiffGenerating;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.jsimpledb.util.Diffs;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>/**<a name="line.23"></a>
<span class="sourceLineNo">024</span> * A composite index associated with a {@link SchemaObjectType}.<a name="line.24"></a>
<span class="sourceLineNo">025</span> */<a name="line.25"></a>
<span class="sourceLineNo">026</span>public class SchemaCompositeIndex extends AbstractSchemaItem implements DiffGenerating&lt;SchemaCompositeIndex&gt; {<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>    private /*final*/ ArrayList&lt;Integer&gt; indexedFields = new ArrayList&lt;&gt;();<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>    /**<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * Get the fields that comprise this index.<a name="line.31"></a>
<span class="sourceLineNo">032</span>     *<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * @return storage IDs of indexed fields<a name="line.33"></a>
<span class="sourceLineNo">034</span>     */<a name="line.34"></a>
<span class="sourceLineNo">035</span>    public List&lt;Integer&gt; getIndexedFields() {<a name="line.35"></a>
<span class="sourceLineNo">036</span>        return this.indexedFields;<a name="line.36"></a>
<span class="sourceLineNo">037</span>    }<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    @Override<a name="line.39"></a>
<span class="sourceLineNo">040</span>    void validate() {<a name="line.40"></a>
<span class="sourceLineNo">041</span>        super.validate();<a name="line.41"></a>
<span class="sourceLineNo">042</span>        if (this.indexedFields.size() &lt; 2 || this.indexedFields.size() &gt; Database.MAX_INDEXED_FIELDS) {<a name="line.42"></a>
<span class="sourceLineNo">043</span>            throw new InvalidSchemaException("invalid " + this + ": between 2 and "<a name="line.43"></a>
<span class="sourceLineNo">044</span>              + Database.MAX_INDEXED_FIELDS + " fields must be specified");<a name="line.44"></a>
<span class="sourceLineNo">045</span>        }<a name="line.45"></a>
<span class="sourceLineNo">046</span>        final HashSet&lt;Integer&gt; idsSeen = new HashSet&lt;Integer&gt;();<a name="line.46"></a>
<span class="sourceLineNo">047</span>        for (int i = 0; i &lt; this.indexedFields.size(); i++) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>            final int storageId = this.indexedFields.get(i);<a name="line.48"></a>
<span class="sourceLineNo">049</span>            if (!idsSeen.add(storageId))<a name="line.49"></a>
<span class="sourceLineNo">050</span>                throw new InvalidSchemaException("invalid " + this + ": duplicate field in composite index: " + storageId);<a name="line.50"></a>
<span class="sourceLineNo">051</span>        }<a name="line.51"></a>
<span class="sourceLineNo">052</span>    }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    @Override<a name="line.54"></a>
<span class="sourceLineNo">055</span>    boolean isCompatibleWithInternal(AbstractSchemaItem that0) {<a name="line.55"></a>
<span class="sourceLineNo">056</span>        final SchemaCompositeIndex that = (SchemaCompositeIndex)that0;<a name="line.56"></a>
<span class="sourceLineNo">057</span>        if (!this.indexedFields.equals(that.indexedFields))<a name="line.57"></a>
<span class="sourceLineNo">058</span>            return false;<a name="line.58"></a>
<span class="sourceLineNo">059</span>        return true;<a name="line.59"></a>
<span class="sourceLineNo">060</span>    }<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span>// XML Reading<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>    @Override<a name="line.64"></a>
<span class="sourceLineNo">065</span>    void readSubElements(XMLStreamReader reader, int formatVersion) throws XMLStreamException {<a name="line.65"></a>
<span class="sourceLineNo">066</span>        this.indexedFields.clear();<a name="line.66"></a>
<span class="sourceLineNo">067</span>        while (this.expect(reader, true, INDEXED_FIELD_TAG)) {<a name="line.67"></a>
<span class="sourceLineNo">068</span>            this.indexedFields.add(this.getIntAttr(reader, STORAGE_ID_ATTRIBUTE));<a name="line.68"></a>
<span class="sourceLineNo">069</span>            this.expectClose(reader);   // &lt;/IndexedField&gt;<a name="line.69"></a>
<span class="sourceLineNo">070</span>        }<a name="line.70"></a>
<span class="sourceLineNo">071</span>        this.indexedFields.trimToSize();<a name="line.71"></a>
<span class="sourceLineNo">072</span>    }<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span>// XML Writing<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>    @Override<a name="line.76"></a>
<span class="sourceLineNo">077</span>    void writeXML(XMLStreamWriter writer) throws XMLStreamException {<a name="line.77"></a>
<span class="sourceLineNo">078</span>        writer.writeStartElement(COMPOSITE_INDEX_TAG.getNamespaceURI(), COMPOSITE_INDEX_TAG.getLocalPart());<a name="line.78"></a>
<span class="sourceLineNo">079</span>        this.writeAttributes(writer, true);<a name="line.79"></a>
<span class="sourceLineNo">080</span>        for (int storageId : this.indexedFields) {<a name="line.80"></a>
<span class="sourceLineNo">081</span>            writer.writeEmptyElement(INDEXED_FIELD_TAG.getNamespaceURI(), INDEXED_FIELD_TAG.getLocalPart());<a name="line.81"></a>
<span class="sourceLineNo">082</span>            writer.writeAttribute(STORAGE_ID_ATTRIBUTE.getNamespaceURI(), STORAGE_ID_ATTRIBUTE.getLocalPart(), "" + storageId);<a name="line.82"></a>
<span class="sourceLineNo">083</span>        }<a name="line.83"></a>
<span class="sourceLineNo">084</span>        writer.writeEndElement();           // &lt;/CompositeIndex&gt;<a name="line.84"></a>
<span class="sourceLineNo">085</span>    }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>// DiffGenerating<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span>    @Override<a name="line.89"></a>
<span class="sourceLineNo">090</span>    public Diffs differencesFrom(SchemaCompositeIndex that) {<a name="line.90"></a>
<span class="sourceLineNo">091</span>        final Diffs diffs = new Diffs(super.differencesFrom(that));<a name="line.91"></a>
<span class="sourceLineNo">092</span>        if (!this.indexedFields.equals(that.indexedFields))<a name="line.92"></a>
<span class="sourceLineNo">093</span>            diffs.add("changed indexed field storage IDs from " + that.indexedFields + " to " + this.indexedFields);<a name="line.93"></a>
<span class="sourceLineNo">094</span>        return diffs;<a name="line.94"></a>
<span class="sourceLineNo">095</span>    }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>// Object<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span>    @Override<a name="line.99"></a>
<span class="sourceLineNo">100</span>    public String toString() {<a name="line.100"></a>
<span class="sourceLineNo">101</span>        return "composite index " + super.toString();<a name="line.101"></a>
<span class="sourceLineNo">102</span>    }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>    @Override<a name="line.104"></a>
<span class="sourceLineNo">105</span>    public boolean equals(Object obj) {<a name="line.105"></a>
<span class="sourceLineNo">106</span>        if (obj == this)<a name="line.106"></a>
<span class="sourceLineNo">107</span>            return true;<a name="line.107"></a>
<span class="sourceLineNo">108</span>        if (!super.equals(obj))<a name="line.108"></a>
<span class="sourceLineNo">109</span>            return false;<a name="line.109"></a>
<span class="sourceLineNo">110</span>        final SchemaCompositeIndex that = (SchemaCompositeIndex)obj;<a name="line.110"></a>
<span class="sourceLineNo">111</span>        return this.indexedFields.equals(that.indexedFields);<a name="line.111"></a>
<span class="sourceLineNo">112</span>    }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span>    @Override<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public int hashCode() {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        return super.hashCode() ^ this.indexedFields.hashCode();<a name="line.116"></a>
<span class="sourceLineNo">117</span>    }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>// Cloneable<a name="line.119"></a>
<span class="sourceLineNo">120</span><a name="line.120"></a>
<span class="sourceLineNo">121</span>    @Override<a name="line.121"></a>
<span class="sourceLineNo">122</span>    @SuppressWarnings("unchecked")<a name="line.122"></a>
<span class="sourceLineNo">123</span>    public SchemaCompositeIndex clone() {<a name="line.123"></a>
<span class="sourceLineNo">124</span>        final SchemaCompositeIndex clone = (SchemaCompositeIndex)super.clone();<a name="line.124"></a>
<span class="sourceLineNo">125</span>        clone.indexedFields = (ArrayList&lt;Integer&gt;)clone.indexedFields.clone();<a name="line.125"></a>
<span class="sourceLineNo">126</span>        return clone;<a name="line.126"></a>
<span class="sourceLineNo">127</span>    }<a name="line.127"></a>
<span class="sourceLineNo">128</span>}<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>




























































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